钙芒硝盐岩溶蚀试验研究  

EXPERIMENTAL STUDY OF CORROSION OF GLAUBERITE SALT ROCK

作　　者：刘中华[1,2] 徐素国[1] 胡耀青[1] 冯增朝[1] 梁卫国[1] 赵阳升[1] 

机构地区：[1]太原理工大学采矿工艺研究所,山西太原030024 [2]太原理工大学阳泉学院,山西阳泉045000

出　　处：《岩石力学与工程学报》2010年第A02期3616-3621,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(50804033);全国优秀博士论文专项资金资助项目(200959);山西省基础研究计划项目(2008021032)

摘　　要：采用μCT225KVFCB型高精度显微CT试验系统,对钙芒硝盐岩试样进行不同溶蚀时间的显微CT扫描,并根据整个溶蚀过程中射线的衰减系数变化,从细观的角度揭示钙芒硝盐岩的溶蚀规律。研究结果表明:随着溶蚀时间的持续,钙芒硝盐岩的密度损伤、孔隙率逐渐增大;随着孔隙率的增大,总比表面积逐渐减小且呈线性下降趋势,而通道比表面积的变化则比较特殊,表现为先增大后减小。研究结果对研究钙芒硝矿床原位溶浸开采的产出率、生产效率和地面沉降具有非常重要的意义。The glauberite salt rock samples are scanned at various corrosion time by the μCT225KVFCB-type high-precision micro-CT test system. According to the different ray attenuation coefficient changes in the whole corrosion process,the corrosion damage law of glauberite salt rock is studied from the perspective of meso-structure. The research results show that the density damage and pore ratio of the glauberite salt rock samples increase gradually,but the total specific surface area declines linearly with corrosion time. Meanwhile,the change in specific surface area of corrosion route way is particular,and it increases at first and then decreases. These research results have a very important significance for studying the output capacity,production efficiency and ground settlement of in-situ corrosion mining of glauberite salt rock deposit.

关 键 词：岩石力学 钙芒硝盐岩 溶蚀 显微CT试验 损伤 

分 类 号：TU45[建筑科学—岩土工程]